DE69125606D1 - METHOD FOR CLEANING CYCLIC ESTERS - Google Patents

METHOD FOR CLEANING CYCLIC ESTERS

Info

Publication number
DE69125606D1
DE69125606D1 DE69125606T DE69125606T DE69125606D1 DE 69125606 D1 DE69125606 D1 DE 69125606D1 DE 69125606 T DE69125606 T DE 69125606T DE 69125606 T DE69125606 T DE 69125606T DE 69125606 D1 DE69125606 D1 DE 69125606D1
Authority
DE
Germany
Prior art keywords
cyclic esters
cleaning cyclic
cleaning
esters
cyclic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE69125606T
Other languages
German (de)
Other versions
DE69125606T2 (en
Inventor
Kamlesh Bhatia
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of DE69125606D1 publication Critical patent/DE69125606D1/en
Application granted granted Critical
Publication of DE69125606T2 publication Critical patent/DE69125606T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D319/00—Heterocyclic compounds containing six-membered rings having two oxygen atoms as the only ring hetero atoms
    • C07D319/10—1,4-Dioxanes; Hydrogenated 1,4-dioxanes
    • C07D319/12—1,4-Dioxanes; Hydrogenated 1,4-dioxanes not condensed with other rings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Heterocyclic Compounds That Contain Two Or More Ring Oxygen Atoms (AREA)
  • Polyesters Or Polycarbonates (AREA)
DE69125606T 1990-05-24 1991-04-29 METHOD FOR CLEANING CYCLIC ESTERS Expired - Fee Related DE69125606T2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/528,632 US5023350A (en) 1990-05-24 1990-05-24 Process for the purification of cyclic esters
PCT/US1991/002815 WO1991017986A1 (en) 1990-05-24 1991-04-29 Process for the purification of cyclic esters

Publications (2)

Publication Number Publication Date
DE69125606D1 true DE69125606D1 (en) 1997-05-15
DE69125606T2 DE69125606T2 (en) 1997-08-14

Family

ID=24106506

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69125606T Expired - Fee Related DE69125606T2 (en) 1990-05-24 1991-04-29 METHOD FOR CLEANING CYCLIC ESTERS

Country Status (11)

Country Link
US (1) US5023350A (en)
EP (1) EP0531462B1 (en)
JP (1) JPH05507076A (en)
CN (1) CN1056689A (en)
AU (1) AU640589B2 (en)
DE (1) DE69125606T2 (en)
IE (1) IE911766A1 (en)
NZ (1) NZ238234A (en)
PL (1) PL166492B1 (en)
PT (1) PT97750A (en)
WO (1) WO1991017986A1 (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5319107A (en) * 1990-09-18 1994-06-07 Biopak Technology, Ltd. Method to produce cyclic esters
US5274127A (en) * 1990-09-18 1993-12-28 Biopak Technology, Ltd. Lactide production from dehydration of aqueous lactic acid feed
US5332839A (en) * 1990-09-18 1994-07-26 Biopak Technology, Ltd. Catalytic production of lactide directly from lactic acid
US5258488A (en) * 1992-01-24 1993-11-02 Cargill, Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US5247059A (en) * 1992-01-24 1993-09-21 Cargill, Incorporated Continuous process for the manufacture of a purified lactide from esters of lactic acid
US5247058A (en) * 1992-01-24 1993-09-21 Cargill, Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US6326458B1 (en) 1992-01-24 2001-12-04 Cargill, Inc. Continuous process for the manufacture of lactide and lactide polymers
US6005067A (en) * 1992-01-24 1999-12-21 Cargill Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US5142023A (en) * 1992-01-24 1992-08-25 Cargill, Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US5675021A (en) * 1992-03-19 1997-10-07 Chronopol, Inc. Method to produce and purify cyclic esters
US5420304A (en) * 1992-03-19 1995-05-30 Biopak Technology, Ltd. Method to produce cyclic esters
US5686630A (en) * 1993-09-29 1997-11-11 Chronopol, Inc. Purifying cyclic esters by aqueous solvent extraction
CA2124842C (en) 1992-10-02 2003-07-15 Patrick R. Gruber A melt-stable lactide polymer fabric and process for manufacture thereof
US6005068A (en) * 1992-10-02 1999-12-21 Cargill Incorporated Melt-stable amorphous lactide polymer film and process for manufacture thereof
US5338822A (en) * 1992-10-02 1994-08-16 Cargill, Incorporated Melt-stable lactide polymer composition and process for manufacture thereof
AU5296393A (en) * 1992-10-02 1994-04-26 Cargill Incorporated Paper having a melt-stable lactide polymer coating and process for manufacture thereof
US5319038A (en) * 1993-02-09 1994-06-07 Johnson & Johnson Orthopaedics, Inc. G35 Process of preparing an absorbable polymer
US5391768A (en) * 1993-03-25 1995-02-21 United States Surgical Corporation Purification of 1,4-dioxan-2-one by crystallization
US5391707A (en) * 1993-12-10 1995-02-21 United States Surgical Corporation Process for the production of dioxanone
US5521278A (en) * 1994-08-18 1996-05-28 Ecological Chemical Products Integrated process for the manufacture of lactide
JPH10109983A (en) * 1996-10-04 1998-04-28 Mitsubishi Gas Chem Co Inc Production and purification of cyclic ester
JP4565208B2 (en) * 2000-03-31 2010-10-20 株式会社クレハ Method for purifying glycolide
US6509179B1 (en) 2000-10-12 2003-01-21 Barbara I. Veldhuis-Stribos Continuous process for preparing lactic acid
SI1694626T1 (en) * 2003-12-10 2008-02-29 Tate & Lyle Plc Purification process for lactide
ES2649369T3 (en) * 2012-12-18 2018-01-11 Uhde Inventa-Fischer Gmbh Device and method for separating a cyclic diester from polymeric melts
EP3080586B1 (en) 2013-12-10 2019-11-06 PURAC Biochem BV Quantification method of impurities in lactide
CN107064318B (en) * 2016-07-22 2019-12-06 中南大学 glycolide standard substance and preparation method and detection method thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4835293A (en) * 1987-02-24 1989-05-30 E. I. Du Pont De Nemours And Company Atmospheric pressure process for preparing pure cyclic esters

Also Published As

Publication number Publication date
AU640589B2 (en) 1993-08-26
US5023350A (en) 1991-06-11
EP0531462A1 (en) 1993-03-17
NZ238234A (en) 1992-04-28
CN1056689A (en) 1991-12-04
JPH05507076A (en) 1993-10-14
EP0531462A4 (en) 1993-03-24
PT97750A (en) 1992-02-28
AU7775491A (en) 1991-12-10
PL166492B1 (en) 1995-05-31
IE911766A1 (en) 1991-12-04
DE69125606T2 (en) 1997-08-14
EP0531462B1 (en) 1997-04-09
WO1991017986A1 (en) 1991-11-28

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee